Test grading and marking method and apparatus



Jail, 6, 1670 Filed March 7, 1967 M. E. HASSFURTHER ET AL TEST GRADING AND MARKING METHOD AND APPARATUS 20 Sheets-Sheet 2 6RD Z9 3-STAGE SHIFT REGISTERS TEsT CARD NSING STATION 5H7! 3H|FT UNE ,4 A CHANNEL III E g3 T U 4A 55 B CHANNEL If; n i i L71: 4A F C CHANNEL 1: T 2 7c 4d L F 4- D CHANNEL II T i? g [44 A I zm/s L i I i E CHANNEL a! SYNC. CHANNEL '2 37 If/T l 40 \Z6 '45 s I A 27 36 7 Y BACKGROUND H CHANNEL N 4/ PHOTOCELL {/1 g T COMPENSATION N 44 g MASTER CARD 50 I V SENSING STATION V A CHANNEL "w. Ta C A E N v 45 H NN L 70 52\ c CHANNEL INV. NOR

K6 53 I D CHANNEL [7/ Kd/ F E CHANNEL [78/ IAN 54 e SYNQCHANNEL KS\ 0 /6 /7 55 BACKGROUND CHANNEL PHOTOCELL COMPENSATION CIRCUIT N8 6, 1570 M. E. HASSFURTHER ET AL 3,487,560

TEST GRADING AND MARKING METHOD AND APPARATUS Filed March 7, 1967 20 Sheets-Sheet 5 FIG. 34 TIMING CHART, EXACT SYNCHRONIZATION TEST CARD ANSWER lNDlCIA PULSE(S) SYNC. PULSES MASTER CARD ANSWER IND TCIA PULSE(S) SYNC PULSES 'SHIF T PULSES SHIFT REGISTER- CHANNEL A IST STAGE 2ND STAGE 3RD STAGE INTERROGATE PULSE(S) (IO-l5 ms) ANS. SYNC. F.F. (AT IOI) KEY SYNC. FE (AT I06) RESET I PULSES RESET- PULSE(S) STROBE PULS HS) TIME, ms 5ms DELAY FROM SHIFT PULSE) 5ms) Jan. 6, 1670 M. E. HASSFURTHER ETAL 3,487,560

TEST GRADING. AND MARKING METHOD AND APPARATUS I Filed March 7, 1967 20 Sheets-Sheet 6 P76. 35 TIME CHART, SYNCHRONIZATION WITH MASTER CARD LEADING TEST CARD ANSWERINDICIA PULSE-1(5) 40 j I I I I SYNC. PULSES ,4 I I II I 1I I MASTER CARD 2/0 {2/1) I Iz/c HZ/d TIZ/e ANSWER INDICIA PULSEIS) ,7, I I1] I I I I A l l I I I 50 l I I I I I I I I I SYNC.PULSES H I P v/ /M y/ I .'//o I l/e' I SHIFTPULSES I I I I III II I I I I SHIFT REGISTER- I 0 I II I It I d I Ie CHANNELA I I I I I I I I I IST STAGE I I I I I I I I I I i 2ND STAGE I I I I I I I I I I I I I I I I I I I I I I I I BRDSTAGE I I I I I I I I I I I I I I I I I I INTERROGATEPULSEISI I I I I I {LII I I I 0| I! I I Ir I I I I I I I Il I ANS. SYNCFFIATIOI) I i I I I I I T 0 II I I I I I I I I I I I I I I I I KEYSYNC.I-'.E(ATIO6) II I II" I n I I I I l RESET-IPULSES I I I III I III III- u u u u PI I v I v RESET-Z PULSEISI I I STROBE PULSEISI ""L; I I I l I I I I I I 0 I00 200 300 400 TIME ms I 5 ms DELAY FROM SHIFT PULSE) I9 5 ms) Jan. 6, 1670 M. E. HASSFURTHER ET AL TEST GRADING AND MARKING METHOD AND APPARATUS Filed March 7, 1967 20 Sheets-Sheet 7 QQAW i 00 576 574 580, 570 POWER 588 [SUPPLIES 593 TEST 59/ 592 SWITCH Jan. 6, 1670 M. E. HASSFURTHER' ET AL TEST GRADING AND MARKING METHOD AND APARATUSl Filed March 7, 1967 20 Sheets-Sheet 9 09 mm 023 mz 20E Sms DELAY-l/5' l KEYSYNC.FF L 5 Jan; 6, 1670 M. E. HASSFURTHER T 39487560 TEST GRADING AND MARKING METHOD AND APPARATUS Filed March 7, 1967 2Q Sheets-Sheet l 0 Ll... .l

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MASTER CARD SENSING STATION mix T0 PHOTOCELL COMPENSATION CIRCUIT 1670 M. E. HASSFURTHER ET AL 3,487,560

TEST GRADING AND MARKING METHOD AND APPARATUS Filed March '7, 1967 2Q Sheets-Sheet l2 MASTER CARD PHOTOCELL COMPENSATION CIRCUIT-L? lllll'lllllllllll'lllu lllll III \ll'l'l Jan. 6,1670 M. E.'HA s L- ET AL 3,487,560

TEST GRADING AND MARKING METHOD AND APPARATUS Filed March 7, 1967 2Q Sheets-Sheet 15 I i I '1' 265 i )g i l I I I I I I :L':

I v v 9 I v I I ONE CARD AND PRINT-92 3/7 9- RIGHT ANSWER TOTAL FOR P 1 ALL CARDS AND DISPLAY-93 I TENS I I WRONG ANSWER TOTAL FOR ONE C RD AND ,/g4 PRINT- 94 i A INTER. l [WRONG ANSWER g 232 l ""'7 T, r AMP. 68' i ..l l l WRONG ANSWER TOTAL FQR ALL CARDS AND DISPLAY- .95

Ja 1670 M. E..HASSFURTHER' ET 3,487,560

TEST-GRADING AND MARKING METHOD AND APPARATUS Filed March 7, 1967 20 Sheets-Sheet 14 TEST CARD MARKING STATION-90 l ERROR MARKER .9/":: J

r I I fl 1670 M. E. HASSFURTHER ET 3,487,560

TEST GRADING AND MARKING METHOD AND APPARATUS Filed March 7, 19"? 2O Sheets-Sheet 15 L E L Nb 3 wt Q wfi \NT \Nm mm tam Jan. 6, 1670 M. E, HA SSFUR THER ET AL 'TEST GRADING AND MARKING METHOD AND APPARATUS 20 Sheets-Sheet 16 Filed March 7, 19"? Jan. 6, 1670 M. E. HASSFURTHER ET AL 3,487,560

TEST GRADING AND MARKING METHOD AND APPARATUS 20 Sheets-Sheet 17 Filed March 7, 1967 QQ 3 \a Jan. 6, 1670 M. E H -SFU ET AL 3,487,560

TEST GRADING AND MARKING METHOD AND APPARATUS Filed March 7, 1967 20 Sheets-Sheet 18 Jan. 6, 1670 M. E. HASSFURTHER ET AL 7,560

TEST GRADING AND MARKING METHOD AND APPARATUS Filed.March 7, 1967 20 Sheets-Sheet 19 Jan. 6, 1670 M. s. HASSFURTHER ET AL 560 TEST GRADING AND MARKING METHOD AND APPARATUS 20 Sheets-Sheet 20 Filed March '7, 1967 QM wt a Ill j Irv? 47A 

